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经营范围
发明名称
Retarded switch
摘要
申请公布号
US2157664(A)
申请公布日期
1939.05.09
申请号
US19380204553
申请日期
1938.04.27
申请人
WILLIAM B. ROBINSON;ALBERT RUTHERFORD
发明人
HANSEN LOUIS E.
分类号
E03D9/052
主分类号
E03D9/052
代理机构
代理人
主权项
地址
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